10.Mass extinctions happened mostly in:Lector inmersivo (1 Punto)
Precambrian Era
Paleozoic Era
Mesozoic Era
Cenozoic Era

What is the orange line on the graph and why is it important? describe the pattern of hurricanes reaching the usa since 1960

All of the following statements about the biosphere are true except: a. light and heat from the sun do not affect the biosphere. b. the biosphere gets resources from earth's crust, hydrosphere and atmosphere. c. like "biology", the name for the biosphere comes from the greek word for life. d. the biosphere includes all living organisms on earth's surface.

The incident command system (ics) is: a. most applicable to the management of complex incidents that extend over many hours or days. b. a military system used in domestic incidents to ensure command and control of federal resources. c. a standardized management tool for meeting the demands of small or large emergency or nonemergency situations. d. a relatively new approach created based on the lessons learned from hurricane harvey disaster operations.